/* 
 * FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
 * Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifndef _MB_PROTO_H
#define _MB_PROTO_H

#ifdef __cplusplus
PR_BEGIN_EXTERN_C
#endif
/* ----------------------- Defines ------------------------------------------*/
#define MB_ADDRESS_BROADCAST                  ( 0 )   /*! Modbus广播地址 */
#define MB_ADDRESS_MIN                        ( 1 )   /*! 最小从机地址 */
#define MB_ADDRESS_MAX                        ( 247 ) /*! 最大从机地址 */
#define MB_FUNC_NONE                          (  0 )  /* 无操作 */
#define MB_FUNC_READ_COILS                    (  1 )  /* 读取线圈状态 */
#define MB_FUNC_READ_DISCRETE_INPUTS          (  2 )  /* 读取离散输入状态 */
#define MB_FUNC_WRITE_SINGLE_COIL             (  5 )  /* 写入单个线圈 */
#define MB_FUNC_WRITE_MULTIPLE_COILS          ( 15 )  /* 写入多个线圈 */
#define MB_FUNC_READ_HOLDING_REGISTER         (  3 )  /* 读取保持寄存器 */
#define MB_FUNC_READ_INPUT_REGISTER           (  4 )  /* 读取输入寄存器 */
#define MB_FUNC_WRITE_REGISTER                (  6 )  /* 写入单个寄存器 */
#define MB_FUNC_WRITE_MULTIPLE_REGISTERS      ( 16 )  /* 写入多个寄存器 */
#define MB_FUNC_READWRITE_MULTIPLE_REGISTERS  ( 23 )  /* 读写多个寄存器 */
#define MB_FUNC_DIAG_READ_EXCEPTION           (  7 )  /* 读取异常状态 */
#define MB_FUNC_DIAG_DIAGNOSTIC               (  8 )  /* 诊断功能 */
#define MB_FUNC_DIAG_GET_COM_EVENT_CNT        ( 11 )  /* 获取通信事件计数 */
#define MB_FUNC_DIAG_GET_COM_EVENT_LOG        ( 12 )  /* 获取通信事件日志 */
#define MB_FUNC_OTHER_REPORT_SLAVEID          ( 17 )  /* 报告从站 ID */
#define MB_FUNC_ERROR                         ( 128 ) /* 错误响应 */
/* ----------------------- Type definitions ---------------------------------*/
typedef enum
{
    MB_EX_NONE                 = 0x00,
    MB_EX_ILLEGAL_FUNCTION     = 0x01,
    MB_EX_ILLEGAL_DATA_ADDRESS = 0x02,
    MB_EX_ILLEGAL_DATA_VALUE   = 0x03,
    MB_EX_SLAVE_DEVICE_FAILURE = 0x04,
    MB_EX_ACKNOWLEDGE          = 0x05,
    MB_EX_SLAVE_BUSY           = 0x06,
    MB_EX_MEMORY_PARITY_ERROR  = 0x08,
    MB_EX_GATEWAY_PATH_FAILED  = 0x0A,
    MB_EX_GATEWAY_TGT_FAILED   = 0x0B
} eMBException;

typedef eMBException(*WHT_MB_Function_Handler_t)(uint8_t* pucFrame, uint16_t* pusLength);

typedef struct
{
    uint8_t ucFunctionCode;
    WHT_MB_Function_Handler_t pxHandler;
} xMBFunctionHandler;

#ifdef __cplusplus
PR_END_EXTERN_C
#endif
#endif
